The trailer will be 2D probably also don't forget, Abrams didn't want it to be in 3D, Paramount made him. Also, it's dangerous to assume that because it'll be in 3D, it'll suck because we really don't know what the hell it'll be about.
We must wait for more information.
And you know all this how?
You said we need to wait for more info.
IMAX and 3D is a fact, it sends a very specific message.